Một vật có m = 0,1 kg, rơi tự do không vận tốc đầu. Khi vật có động năng 4 J thì quãng đường vật rơi được là bao nhiêu? Cho g = 10m/s2

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

Classify each possible hypothesis about a medicinal aloe vera plant as falsifiable or non-falsifiable. aloe vera gel is the best natural skin moisturizer. aloe vera gel can heal wounds by boosting cell renewal. aloe vera juice tastes better than carrot juice. drinking aloe juice can reduce the risk of lung cancer.

What are atoms of the same element with varying number of neutrons